[Bluetooth] Fix userspace breakage due missing class links
[linux-2.6.git] / net / bluetooth / hci_sysfs.c
1 /* Bluetooth HCI driver model support. */
2
3 #include <linux/kernel.h>
4 #include <linux/init.h>
5
6 #include <net/bluetooth/bluetooth.h>
7 #include <net/bluetooth/hci_core.h>
8
9 #ifndef CONFIG_BT_HCI_CORE_DEBUG
10 #undef  BT_DBG
11 #define BT_DBG(D...)
12 #endif
13
14 struct class *bt_class = NULL;
15 EXPORT_SYMBOL_GPL(bt_class);
16
17 static struct workqueue_struct *btaddconn;
18 static struct workqueue_struct *btdelconn;
19
20 static inline char *link_typetostr(int type)
21 {
22         switch (type) {
23         case ACL_LINK:
24                 return "ACL";
25         case SCO_LINK:
26                 return "SCO";
27         case ESCO_LINK:
28                 return "eSCO";
29         default:
30                 return "UNKNOWN";
31         }
32 }
33
34 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf)
35 {
36         struct hci_conn *conn = dev_get_drvdata(dev);
37         return sprintf(buf, "%s\n", link_typetostr(conn->type));
38 }
39
40 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf)
41 {
42         struct hci_conn *conn = dev_get_drvdata(dev);
43         bdaddr_t bdaddr;
44         baswap(&bdaddr, &conn->dst);
45         return sprintf(buf, "%s\n", batostr(&bdaddr));
46 }
47
48 static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf)
49 {
50         struct hci_conn *conn = dev_get_drvdata(dev);
51
52         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
53                                 conn->features[0], conn->features[1],
54                                 conn->features[2], conn->features[3],
55                                 conn->features[4], conn->features[5],
56                                 conn->features[6], conn->features[7]);
57 }
58
59 #define LINK_ATTR(_name,_mode,_show,_store) \
60 struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store)
61
62 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL);
63 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL);
64 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL);
65
66 static struct attribute *bt_link_attrs[] = {
67         &link_attr_type.attr,
68         &link_attr_address.attr,
69         &link_attr_features.attr,
70         NULL
71 };
72
73 static struct attribute_group bt_link_group = {
74         .attrs = bt_link_attrs,
75 };
76
77 static struct attribute_group *bt_link_groups[] = {
78         &bt_link_group,
79         NULL
80 };
81
82 static void bt_link_release(struct device *dev)
83 {
84         void *data = dev_get_drvdata(dev);
85         kfree(data);
86 }
87
88 static struct device_type bt_link = {
89         .name    = "link",
90         .groups  = bt_link_groups,
91         .release = bt_link_release,
92 };
93
94 static void add_conn(struct work_struct *work)
95 {
96         struct hci_conn *conn = container_of(work, struct hci_conn, work);
97
98         flush_workqueue(btdelconn);
99
100         if (device_add(&conn->dev) < 0) {
101                 BT_ERR("Failed to register connection device");
102                 return;
103         }
104 }
105
106 void hci_conn_add_sysfs(struct hci_conn *conn)
107 {
108         struct hci_dev *hdev = conn->hdev;
109
110         BT_DBG("conn %p", conn);
111
112         conn->dev.type = &bt_link;
113         conn->dev.class = bt_class;
114         conn->dev.parent = &hdev->dev;
115
116         snprintf(conn->dev.bus_id, BUS_ID_SIZE, "%s:%d",
117                                         hdev->name, conn->handle);
118
119         dev_set_drvdata(&conn->dev, conn);
120
121         device_initialize(&conn->dev);
122
123         INIT_WORK(&conn->work, add_conn);
124
125         queue_work(btaddconn, &conn->work);
126 }
127
128 /*
129  * The rfcomm tty device will possibly retain even when conn
130  * is down, and sysfs doesn't support move zombie device,
131  * so we should move the device before conn device is destroyed.
132  */
133 static int __match_tty(struct device *dev, void *data)
134 {
135         return !strncmp(dev->bus_id, "rfcomm", 6);
136 }
137
138 static void del_conn(struct work_struct *work)
139 {
140         struct hci_conn *conn = container_of(work, struct hci_conn, work);
141         struct hci_dev *hdev = conn->hdev;
142
143         while (1) {
144                 struct device *dev;
145
146                 dev = device_find_child(&conn->dev, NULL, __match_tty);
147                 if (!dev)
148                         break;
149                 device_move(dev, NULL);
150                 put_device(dev);
151         }
152
153         device_del(&conn->dev);
154         put_device(&conn->dev);
155         hci_dev_put(hdev);
156 }
157
158 void hci_conn_del_sysfs(struct hci_conn *conn)
159 {
160         BT_DBG("conn %p", conn);
161
162         if (!device_is_registered(&conn->dev))
163                 return;
164
165         INIT_WORK(&conn->work, del_conn);
166
167         queue_work(btdelconn, &conn->work);
168 }
169
170 static inline char *host_typetostr(int type)
171 {
172         switch (type) {
173         case HCI_VIRTUAL:
174                 return "VIRTUAL";
175         case HCI_USB:
176                 return "USB";
177         case HCI_PCCARD:
178                 return "PCCARD";
179         case HCI_UART:
180                 return "UART";
181         case HCI_RS232:
182                 return "RS232";
183         case HCI_PCI:
184                 return "PCI";
185         case HCI_SDIO:
186                 return "SDIO";
187         default:
188                 return "UNKNOWN";
189         }
190 }
191
192 static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf)
193 {
194         struct hci_dev *hdev = dev_get_drvdata(dev);
195         return sprintf(buf, "%s\n", host_typetostr(hdev->type));
196 }
197
198 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
199 {
200         struct hci_dev *hdev = dev_get_drvdata(dev);
201         char name[249];
202         int i;
203
204         for (i = 0; i < 248; i++)
205                 name[i] = hdev->dev_name[i];
206
207         name[248] = '\0';
208         return sprintf(buf, "%s\n", name);
209 }
210
211 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf)
212 {
213         struct hci_dev *hdev = dev_get_drvdata(dev);
214         return sprintf(buf, "0x%.2x%.2x%.2x\n",
215                         hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]);
216 }
217
218 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf)
219 {
220         struct hci_dev *hdev = dev_get_drvdata(dev);
221         bdaddr_t bdaddr;
222         baswap(&bdaddr, &hdev->bdaddr);
223         return sprintf(buf, "%s\n", batostr(&bdaddr));
224 }
225
226 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf)
227 {
228         struct hci_dev *hdev = dev_get_drvdata(dev);
229
230         return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
231                                 hdev->features[0], hdev->features[1],
232                                 hdev->features[2], hdev->features[3],
233                                 hdev->features[4], hdev->features[5],
234                                 hdev->features[6], hdev->features[7]);
235 }
236
237 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf)
238 {
239         struct hci_dev *hdev = dev_get_drvdata(dev);
240         return sprintf(buf, "%d\n", hdev->manufacturer);
241 }
242
243 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf)
244 {
245         struct hci_dev *hdev = dev_get_drvdata(dev);
246         return sprintf(buf, "%d\n", hdev->hci_ver);
247 }
248
249 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf)
250 {
251         struct hci_dev *hdev = dev_get_drvdata(dev);
252         return sprintf(buf, "%d\n", hdev->hci_rev);
253 }
254
255 static ssize_t show_inquiry_cache(struct device *dev, struct device_attribute *attr, char *buf)
256 {
257         struct hci_dev *hdev = dev_get_drvdata(dev);
258         struct inquiry_cache *cache = &hdev->inq_cache;
259         struct inquiry_entry *e;
260         int n = 0;
261
262         hci_dev_lock_bh(hdev);
263
264         for (e = cache->list; e; e = e->next) {
265                 struct inquiry_data *data = &e->data;
266                 bdaddr_t bdaddr;
267                 baswap(&bdaddr, &data->bdaddr);
268                 n += sprintf(buf + n, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n",
269                                 batostr(&bdaddr),
270                                 data->pscan_rep_mode, data->pscan_period_mode,
271                                 data->pscan_mode, data->dev_class[2],
272                                 data->dev_class[1], data->dev_class[0],
273                                 __le16_to_cpu(data->clock_offset),
274                                 data->rssi, data->ssp_mode, e->timestamp);
275         }
276
277         hci_dev_unlock_bh(hdev);
278         return n;
279 }
280
281 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf)
282 {
283         struct hci_dev *hdev = dev_get_drvdata(dev);
284         return sprintf(buf, "%d\n", hdev->idle_timeout);
285 }
286
287 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
288 {
289         struct hci_dev *hdev = dev_get_drvdata(dev);
290         char *ptr;
291         __u32 val;
292
293         val = simple_strtoul(buf, &ptr, 10);
294         if (ptr == buf)
295                 return -EINVAL;
296
297         if (val != 0 && (val < 500 || val > 3600000))
298                 return -EINVAL;
299
300         hdev->idle_timeout = val;
301
302         return count;
303 }
304
305 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf)
306 {
307         struct hci_dev *hdev = dev_get_drvdata(dev);
308         return sprintf(buf, "%d\n", hdev->sniff_max_interval);
309 }
310
311 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
312 {
313         struct hci_dev *hdev = dev_get_drvdata(dev);
314         char *ptr;
315         __u16 val;
316
317         val = simple_strtoul(buf, &ptr, 10);
318         if (ptr == buf)
319                 return -EINVAL;
320
321         if (val < 0x0002 || val > 0xFFFE || val % 2)
322                 return -EINVAL;
323
324         if (val < hdev->sniff_min_interval)
325                 return -EINVAL;
326
327         hdev->sniff_max_interval = val;
328
329         return count;
330 }
331
332 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf)
333 {
334         struct hci_dev *hdev = dev_get_drvdata(dev);
335         return sprintf(buf, "%d\n", hdev->sniff_min_interval);
336 }
337
338 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
339 {
340         struct hci_dev *hdev = dev_get_drvdata(dev);
341         char *ptr;
342         __u16 val;
343
344         val = simple_strtoul(buf, &ptr, 10);
345         if (ptr == buf)
346                 return -EINVAL;
347
348         if (val < 0x0002 || val > 0xFFFE || val % 2)
349                 return -EINVAL;
350
351         if (val > hdev->sniff_max_interval)
352                 return -EINVAL;
353
354         hdev->sniff_min_interval = val;
355
356         return count;
357 }
358
359 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
360 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
361 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL);
362 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
363 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL);
364 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL);
365 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL);
366 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL);
367 static DEVICE_ATTR(inquiry_cache, S_IRUGO, show_inquiry_cache, NULL);
368
369 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR,
370                                 show_idle_timeout, store_idle_timeout);
371 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR,
372                                 show_sniff_max_interval, store_sniff_max_interval);
373 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR,
374                                 show_sniff_min_interval, store_sniff_min_interval);
375
376 static struct attribute *bt_host_attrs[] = {
377         &dev_attr_type.attr,
378         &dev_attr_name.attr,
379         &dev_attr_class.attr,
380         &dev_attr_address.attr,
381         &dev_attr_features.attr,
382         &dev_attr_manufacturer.attr,
383         &dev_attr_hci_version.attr,
384         &dev_attr_hci_revision.attr,
385         &dev_attr_inquiry_cache.attr,
386         &dev_attr_idle_timeout.attr,
387         &dev_attr_sniff_max_interval.attr,
388         &dev_attr_sniff_min_interval.attr,
389         NULL
390 };
391
392 static struct attribute_group bt_host_group = {
393         .attrs = bt_host_attrs,
394 };
395
396 static struct attribute_group *bt_host_groups[] = {
397         &bt_host_group,
398         NULL
399 };
400
401 static void bt_host_release(struct device *dev)
402 {
403         void *data = dev_get_drvdata(dev);
404         kfree(data);
405 }
406
407 static struct device_type bt_host = {
408         .name    = "host",
409         .groups  = bt_host_groups,
410         .release = bt_host_release,
411 };
412
413 int hci_register_sysfs(struct hci_dev *hdev)
414 {
415         struct device *dev = &hdev->dev;
416         int err;
417
418         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
419
420         dev->type = &bt_host;
421         dev->class = bt_class;
422         dev->parent = hdev->parent;
423
424         strlcpy(dev->bus_id, hdev->name, BUS_ID_SIZE);
425
426         dev_set_drvdata(dev, hdev);
427
428         err = device_register(dev);
429         if (err < 0)
430                 return err;
431
432         return 0;
433 }
434
435 void hci_unregister_sysfs(struct hci_dev *hdev)
436 {
437         BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type);
438
439         device_del(&hdev->dev);
440 }
441
442 int __init bt_sysfs_init(void)
443 {
444         btaddconn = create_singlethread_workqueue("btaddconn");
445         if (!btaddconn)
446                 return -ENOMEM;
447
448         btdelconn = create_singlethread_workqueue("btdelconn");
449         if (!btdelconn) {
450                 destroy_workqueue(btaddconn);
451                 return -ENOMEM;
452         }
453
454         bt_class = class_create(THIS_MODULE, "bluetooth");
455         if (IS_ERR(bt_class)) {
456                 destroy_workqueue(btdelconn);
457                 destroy_workqueue(btaddconn);
458                 return PTR_ERR(bt_class);
459         }
460
461         return 0;
462 }
463
464 void bt_sysfs_cleanup(void)
465 {
466         destroy_workqueue(btaddconn);
467         destroy_workqueue(btdelconn);
468
469         class_destroy(bt_class);
470 }